1、Designation: C 681 03 (Reapproved 2009)Standard Test Method forVolatility of Oil- and Resin-Based, Knife-Grade, ChannelGlazing Compounds1This standard is issued under the fixed designation C 681; the number immediately following the designation indicates the year oforiginal adoption or, in the case
2、of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method describes the determination of thevolatility of oil- and resin-based, knife-
3、grade, channel glazingcompounds.1.2 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation only.1.3 The subcommittee with jurisdiction is not aware of anysimilar ISO standard.1.4 This standard does not purport to address all of the
4、safety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:C 717 Terminology of Building
5、 Seals and Sealants3. Terminology3.1 DefinitionsRefer to Terminology C 717 for definitionsof the following terms: glazing, compound.3.2 Description of TermRefer to Terminology C 717 forthe description of the following term: channel.4. Summary of Test Method4.1 The channel glazing compound is placed
6、into a taredaluminum dish and weighed. The test specimen is then placedinto an oven for a period of 3 h. After cooling, the testspecimen is reweighed and the percent of volatile mattercalculated.5. Significance and Use5.1 This test method provides a guide as to the amount ofvolatile matter that will
7、 be emitted from a channel glazingcompound when tested by this test method.6. Apparatus6.1 Cabinet or Room, capable of maintaining a temperatureof 73.4 6 3.6F (23 6 2C) at 50 6 5 % relative humidity forextended periods of time.6.2 Forced-Draft Oven, capable of maintaining a tempera-ture of 220 6 5F
8、(104 6 3C) for extended periods of time.6.3 Dish, aluminum foil, 2.5 in. (64 mm) in diameter by0.75 in. (19 mm) deep, with a flat bottom.6.4 Balance, laboratory analytical type.6.5 Steel Spatula or Putty Knife, with a blade about 4 in.(102 mm) long and 0.75 in. (19 mm) wide.6.6 Desiccator.7. Procedu
9、re7.1 Condition a sample of channel glazing compound in atightly closed container 24 h at 73.4 6 3.6F (23 6 2C) priorto testing. Mix the channel glazing compound thoroughly witha spatula to ensure uniformity of the sample to be tested.7.2 Weigh the aluminum foil dish to the nearest 0.01 g andrecord
10、the tare weight.7.3 Transfer approximately 3 to5gofthecompound intothe tared aluminum foil dish, using the spatula, and spread thecompound uniformly over the bottom of the dish.7.4 Weigh the dish containing the compound quickly andaccurately to the nearest 0.01 g. Record the combined weightof the di
11、sh and the compound.7.5 Place the dish containing the compound into an ovencontrolled at 220 6 5F (104 6 3C) for a period of 3 h, coolin desiccator at 73.4 6 3.6F (23 6 2C) for 1 h, weighaccurately to the nearest 0.01 g, and record the weight of thedish plus the sample after heating.8. Calculation8.
12、1 Calculate the percent of volatile matter, V, in the channelglazing compound as follows:V 5A 2 BC3 100 (1)where:A = weight of the dish plus the sample, g,B = weight of the dish plus the sample after heating, g, and1This test method is under the jurisdiction ofASTM Committee C24 on BuildingSeals and
13、 Sealants and is the direct responsibility of Subcommittee C24.20 onGeneral Test Methods.Current edition approved Jan. 1, 2009. Published March 2009. Originallyapproved in 1971. Last previous edition approved in 2003 as C 681 03.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West
14、 Conshohocken, PA 19428-2959, United States.C = sample weight, g.9. Report9.1 Report the percent of volatile matter, calculated to thenearest 0.5 %.10. Precision10.1 The multioperator-day precision for the volatility testis 60.5 %.11. Keywords11.1 channel glazing compound; knife grade; volatilityAST
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18、on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).C 681 03 (2009)2
